Ann was readinga detective novel,lost complete to the outside world句中lost作什么语?to the outside world作什么语?

Ann was readinga detective novel,lost complete to the outside world句中lost作什么语?to the outside world作什么语? Det He asked me if I was ____ on readingA .keenB .eagerC .interestedD .happy ann was very happy 改为感叹句 英语,unit2 readingA 翻译! Ann Ann [ ](feel)happy when she was in Cuilin Ann was____in scicnce when she was very young det是什么意思 det.是什么意思? Ann was 30kg last year.she was a bit____last year than this year一个词！ 初二上英语书第三单元readingA翻译 n阶行列式化三角式D=det(aij)=I a11.a1n II .II an1.ann I书上说作运算ri+krj,可化为下三角式.为什么说一定能化为下三角式啊? 这个行列式怎么展开的fA（λ）=det（λI-A）= λ^n-（a11+a22+a33、、、+ann）λ ^n-1、、、+（-1）^ndet（A） 2000.det det说的是什么我不明白？ Ann was l——enough to pass the exam this time. ANN was seen go into the teacher's offoce just now Ann was telling Gary to drive slowly(针对划线部分提问)对to drive slowly提问